Buffer overflow in Wavlink Wn536ax6-A
CVE-2026-120281
A vulnerability was found in WAVLINK WN536AX6-A V260507. This affects the function strcpy of the file /protocol.csp of the component OpenVPN Handler. The manipulation of the argument openvpn_ip results in stack-based buffer overflow. The attack may be launched remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure.
Vulnerability class: Buffer Overflow
Published .
CVSS v3 metric
CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Wavlink Wn536ax6-A — versions V260507
Weakness classification (CWE)
References
- vuldb.com/vuln/429625 (technical-description, vdb-entry)
- vuldb.com/vuln/429625/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-120281 (third-party-advisory)
- vuldb.com/submit/919790 (third-party-advisory)
- github.com/F-yyjy/cve/blob/main/WN536AX6-A_openvpn_ip.md (exploit)
Frequently asked questions
- What is CVE-2026-120281?
- CVE-2026-120281 is a critical-severity vulnerability in Wavlink Wn536ax6-A, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 10.0/10. Published 2026-11-02.
- How severe is CVE-2026-120281?
- Critical severity. CVSS v3 base score is 10.0 out of 10.